diff --git a/example/complex.nix b/example/complex.nix
index b361196..939f71e 100644
--- a/example/complex.nix
+++ b/example/complex.nix
@@ -39,6 +39,9 @@
               type = "luks";
               name = "crypted1";
               keyFile = "/tmp/secret.key";
+              extraArgs = [
+                "--iter-time 1"
+              ];
               content = {
                 type = "lvm_pv";
                 vg = "pool";
@@ -64,6 +67,9 @@
               type = "luks";
               name = "crypted2";
               keyFile = "/tmp/secret.key";
+              extraArgs = [
+                "--iter-time 1"
+              ];
               content = {
                 type = "lvm_pv";
                 vg = "pool";